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Pneumopericardium: A Rare Complication of Pericardiocentesis
Slama Iskander,Hidoud Amar,Boudes Audrey,Devemy Fabien 한국심초음파학회 2016 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.24 No.1
Pneumopericardium is defined by the presence of air in the pericardial cavity. It is a rare entity occurring most commonly aftertrauma. Pneumopericardium resulting after pericardiocentesis is even rarer. We report a case of 46-year-old man, with end-stagerenal disease on chronic hemodialysis and who developed a large circumferential pericardial effusion of 40 mm in diastole withswinging heart and diastolic right atrium collapse requiring pericardiocentesis. Few days after, the patient complained of pleuriticchest pain and echocardiogram revealed several tiny sparkling echogenic spots swirling in the pericardial sac. Computed tomographyscans revealed a marked anterior pneumopericardium that was conservatively managed.
Rim Khlifi-Slama,Tahar Mechichi,Sami Sayadi,Abdelhafidh Dhouib 한국미생물학회 2012 The journal of microbiology Vol.50 No.2
The purpose of the present study was to determine the effect of natural mediators on the stability of the Trametes trogii crude laccase in the process of decolourization of textile effluents. Acetosyringone allowed the highest wastewaters decolourization rate of 25%. At higher concentrations of acetosyringone, the relative activity of laccase decreased approximately by between 38% and 88% after 5 days of incubation. T. trogii laccase was strongly inactivated at 3mM syringaldehyde, after 3 days of incubation. However,laccase activity is more stable in the presence of the vanillin and m-coumarate. The T. trogii growth on solid effluentbased-medium was examined and evaluated by measuring the colony diameter in cm. T. trogii was completely inhibited on 100:0 and 80:20 effluent:water solid medium, however,colony diameter reached 5 cm on 60:40 effluent:water solid medium after 13–14 days incubation. When the textile effluent was pre-treated with laccase and laccase-acetosyringone system, the colony diameter of 2 cm of T. trogii on 80:20effluent:water solid medium was reached after 14 and 10days of incubation respectively.
Missaoui Sami,Driss Zied,Slama Romdhane Ben,Chaouachi Bechir 대한설비공학회 2022 International Journal of Air-Conditioning and Refr Vol.30 No.1
A new coupled numerical model of the overall vapor-compression cycle and water heater was developed in order to analyze the influence of condenser coil designs on the heat transfer process of a helical coil heat exchanger immersed in a storage tank. The model was developed using the CFD code ANSYS Fluent. In the numerical simulation, the helical condenser coil was treated as an internal heat source and the initial heat flux was obtained from experimental results and delivered to each coil element in the CFD model as boundary condition.The coupled model was validated with experimental results and showed that the numerical results of the proposed model are in good agreement with the experimental data with the deviation of ± 1.6%. Then, the impact of the main representative geometrical parameter on the overall heat transfer coefficient and water temperature distribution was investigated. The results indicated that the temperature distribution and overall heat transfer coefficient increase with the increase of the pipe turns of a helically coiled tube heat exchanger.
Missaoui Sami,Driss Zied,Ben Slama Romdhane,Chaouachi Bechir 대한설비공학회 2021 International Journal Of Air-Conditioning and Refr Vol.29 No.3
This study presents a coupled model to simulate the heat transfer process between the helical condenser coil and the water inside the tank. This coupled model was developed using ANSYS Fluent Computational Fluid Dynamics (CFD). The heat flux of the condenser coils is obtained from our experimental investigation and delivered as initial boundary conditions to the tank model. The results obtained are considered essential and are, in turn, capable of assessing the performance of the modified domestic refrigerator for the production of hot water. According to this model, the results confirmed that the coefficient of heat transfer and the performance of the system decreased with an increase in the heating time. The natural heat transfer coefficient Uc falls from 727.26[Formula: see text]W [Formula: see text] m[Formula: see text] [Formula: see text] K[Formula: see text] to 68.64[Formula: see text]W [Formula: see text] m[Formula: see text] [Formula: see text] K[Formula: see text] during the total heating cycle, and the water temperature rises from 20 ∘ C to 50.73∘ C. In addition, the impact of water temperature on the evaporating region was used in this analysis. Therefore, the temperature of the evaporator is unaffected by the development of hot water. As a result, these outcomes will be used for the development of the domestic refrigerator with immersed condenser coil.
Ben Hmad Halima,Gara Sonia,Khlifi Sarra,Ben Jemaa Houda,Ben Slama Fethi,Aouidet Abdallah 한국식품영양과학회 2018 Journal of medicinal food Vol.21 No.1
Metabolic syndrome is a serious consequence of obesity characterized by increased cardiovascular risk factors such as hypertension, dyslipidemia, and glucose intolerance. While diets enriched with natural antioxidants showed beneficial effects on oxidative stress, blood pressure, and serum lipid composition, diet supplementation with synthetic antioxidants showed contradictive results. Thus, we tested, in this study, whether a daily dosage of Apple Cider Vinegar (ACV) would affect cardiovascular risk factor associated with obesity in high-fat diet (HFD)-induced hyperlipidemic Wistar rats. Obese rats showed increased serum total cholesterol, triglyceride, low-density lipoprotein-cholesterol (LDL-C), very low density lipoprotein (VLDL) and atherogenic index after 6 and 9 weeks of being fed an HFD. Importantly, ACV ameliorated all of these parameters significantly. Oxidative stress already developed after 6 weeks of HFD and was significantly reduced by daily doses of ACV. Oral administration of ACV normalized various biochemical and metabolic changes since it exhibited a very significant (P < .001) reduction in malondialdehyde levels, whereas an increase in thiol group concentrations and antioxidant status (superoxide dismutase [SOD], glutathione peroxidase [GPx], and catalase [CAT] activities and vitamin E concentrations). In addition, a modulation in trace element levels was observed when compared with HFD groups. These findings suggested that HFD alters the oxidant–antioxidant balance, as evidenced by a reduction in the antioxidant enzyme activities and vitamin E level, and enhanced lipid peroxidation. ACV can be beneficial for the suppression of obesity-induced oxidative stress in HFD rats through the modulating antioxidant defense system and reduces the risk of obesity-associated diseases by preventing the atherogenic risk.